Hypodermic syringe.



No. 718,979. PATENTED JAN. 27, 1903- M. GAMPBELL. 'HYPODERMIG SYRINGE.APPLICATION IILL'D arm. 5, 1902. no MODEL.

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UnTTien STaTrts PATENT FFICE.

MlLTON CAMPBELL, OF PHILADELPHIA, PENNSYLVANIA.

HYPODERIWIC SYRINGE.

SEEUIFIEEEATION forming part of Letters Patent No. 718,979, datedJanuary 27,

Application filed September 5, 1902. Serial No. 122,198. (No model.)

To all whom 2'0 1mm concern:

Be it known that I, MILTON CAMPBELL, a citizen of the United States,residing at Philadelphia, Pennsylvania, have invented certain new anduseful Improvements in Hypodermic Syringes, of which the following is aspecification.

My invention relates to that class of hypodermic syringes for use instoring and administering serums, dzc. In this class of devices theentire implement is to be used but a single time and then thrown away,and in consequenceit must be quiteinexpensive, occupy but little space,and its parts be capable of ready assemblage. Moreover, the needle, aswell as the serum, should be inclosed and pro tected from the air.

The objects of my invention are to provide a device of the characterdescribed in which the syringe-barrel, which serves also as a holder fora charge of serum, shall be closed at one end by a frangible point orextension and at the other end by a piston-forming stopper and toprovide a tubular plunger entirely separate from the syringe-barrel andcontaining a needle occluded from the air by means of sterilized cottonor equivalent material at one or both ends, said plunger adapted to pushthe piston-forming stopper into the-barrel to discharge the contentsfrom the severed point or extension to which the needle will have beenconnected by means of a short length of flexible tubing. These objects Iaccomplish by the construction shown in the accompanying drawings, inwhich- Figure 1 is a side elevation of my improved hypodermic syringewith the syringe-barrel in use as a storage-receptacle for the serum andthe plunger as a storage-receptacle for the needle. Fig. 2 shows theparts assembled when ready for use as a syringe. Fig. 3 is a detail viewof the piston-forming stopper. Fig. l is a sectional view of a plungerclosed at one end.

A designates the syringe-barrel, which also forms the storage-receptaclefor the serum or other substance and is preferably of glass. This barrelA is formed at one end with a closed frangible point or extension a, andat its other end is sealed by the stopper A, which not only preventsegress of the material in the barrel, but also prevents the entrance ofair. This stopper A also forms the syringepiston when actuated by theneedle-carrying plunger B, now to be described. This plunger 13 ispreferably formed of a length of glass tube of a size to snugly work inthe syringebarrel A and force the piston-forming stopper inwardly toexpel the contents of the barrel. The needle 0 is sterilized eitherbefore or when placed in this tubular plunger, which is closed by meansof sterilized cotton. Cotton may housed at both ends of the plunger, orthe plunger may be formedof a tube closed at one end, in which case theopen end will be plugged with sterilized cotton, this material in bothinstances serving to occlude the needle from the outer air.

The implement above described may be shipped in individual boxes or anumber may be placed in a box-say a dozen.

When it -is desired to administer a dose of the serum or other fluid,the operator will remove the needle 0 from the plunger B, then break offthe end of the point orextension a and couple the needle to said pointby means of the coupling 0, formed, preferably, of a short length ofrubber tubing carried by the heel of the needle. One end of the plungerwill now be pressed against the piston-forming stopper A and the latterstarted inwardly. The operator will now grasp the syringe in the usualmanner by means of the finger-rests a a and use the thumb to force inthe plunger.

It will be seen that the device is exceedingly simple and inexpensiveand will greatly facilitate the storage of the material and needle andthe administration of hypodermic injections. As the contents of thesyringe and the needle also are both protected from external influencesand as the needle and other parts are to be used at but one operation,all chances of infecting the patient are avoided.

For the more perfect sealing of the barrel or tube A by the stopper orplug A, I preferably form said stopper with a grooved surface ct, andthis groove also causes the stopper to work more satisfactorily as apiston when pushed in by the plunger B, as it forms an air-space aroundthe stopper and prevents backing up of the fluid and prevents thestopper from sticking. This groove also allows the use of a lubricant,such as a talcum or other suitable material, and not only so, but italso allows the stopper to yield sufficiently to pass inequalities inthe bore of the barrel. The stopper or plug A may be made of rubber,cork, or other suitable material, and its front side or that next to theliquid is formed with a projection a which serves to cause the expulsionof practically the entire contents of the barrel A. If desired,

however, the working face of The plug may be flat or concave or anyother suitable shape.

What I claim is- Inahypodermicsyringe,acornbinedsyringe andstorage-receptacle comprisinga tube having one end sealed and adaptedfor connection with a syringe-needle, a piston-forming stopper closingthe other end of said tube, and a plunger formed of a length of tube ofa size to enter the first-named tube and force its stopper inwardly toexpel the contents; said plunger being of a length to contain the needleand its coupling, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

MILTON CAMPBELL.

Witnesses:

HENRY N. WIDENER, JOHN F. LENNY.

